Dust-collector



(No Model.) 3 sheetssheer 1.

R. WHITEHILL.

DUST COLLECTOR.

No. 360,129. Patented Mar. 29 1887.

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(No Model.) 3 Sheets-Sheet 2.

R. WHITEHILL.

DUST COLLECTOR.

Patented Mar. 29, 1887.

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(No Model.)

R. WHITEHILL.

DUST COLLECTOR.

No. 360,129. Patented Mar. 2,9, 1887.

myn @sees v' UNITED STATES ATENT Friend,

ROBERT W'HITEHILL, OF MILVAUKEE, VISCONSIN.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 360,129, dated March 29, 1887.

Application filed January 21, 1886. Serial No. 189,266.

To (LZ2 whom, it may concern:

Be it known that I, ROBERT WHITEHILL, of Milwaukee, in the county of Milwaukee, and in the State 0f Visconsin, have invented certain new and useful Improvements in Dust- Collectors; and I d o hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to dust-collectors for flouring-mills; and it consists in certain peculiarities of construction and combination of parts, as will be fully described hereinafter with reference to the accompanying drawings and subsequently claimed.

Figure l represents a side elevation, partly in section, showing the casing of my dust-collector, a portion ofthe balloon, driving-gear, and air-discharge nozzle; Fig. 2, an enlarged detail sectional view showing` the means for forming an air-tight joint between the draftflue and balloon-head; Fig. 3, a vertical longitudinal section showing the internal con` struction of my dnst-collector and the operative relation of thel several parts composing the same; Fig. 4, an enlarged detail sectional viewshowing a portion of the balloon,a toothed segment-plate, a portion of the casing, and one of the guides for the annulus that is formed by the segment-plates; and Fig. 5, a vertical section through the fan, with the adjacent end of the main casing removed to show the relative position of the balloonfcloth and brush.

A represents the easing of my dust-collector, which is provided with a removable hood, A; and B, a central drivingshaft, to which motion is imparted in any suitable manner. One end of the shaft B is worm-geared at ce to a vertical shaft, O, which in turn is bevel-geared at b to a horizontal shaft, D, this latter shaft having a sprocket-wheel-and-chain connection, c, with a conveyer, E.

To the horizontal shaft D, near each end and within the casing A, are keyed gearwheels F, which respectively mesh with an annulus formed by a series of toothed segmentplates, d, bolted or otherwise secured to the outer sides of the solid circular balloon-heads G G, so as to revolve in anged guides e, secured to the inner sides of the casing A, as illustrated in detail, Fig. Ll, and the head G has (No model.)

a loose bearing on the shaft B, while the gearwheels F F revolve said heads by engagement with the toothed annuli formed thereon.

To the heads G G is fastened in any suitable manner the balloon-cloth H, and this cloth is held taut by means of cords j', having their ends united by springs g, the tension of the latter acting to draw said cords and cloth into annular grooves h, formed in the rims of the aforesaid balloon-heads. Suitably secured to o/ne of the outer sides of the casing A is the casing I of a suction-fan, the vanest' of said fan being keyed to the drivingshaft B.

Leading from the center of the balloon to the interior of the fan-casing` is a horizontal draft-fine, K, and depending from said faucasing is a blast-fine, L, adapted to enter the casing A, and provided at its inner end with a tapering nozzle, M, having a minute dis` charge-opening or mouth, k, designed to come immediately beneath the balloon-cloth H, on a line with the axial center of a transverse brush, N, that is suspended inbrackets m, secured to a beam, a, made fast to that portion of the draft-flue K upon the inside of the balloon. Instead of the brush N, I may employ a roller to depress the balloon-cloth, so as to bring the latter directly in the path of the air discharged through the nozzle M.

In order to form an air-tight joint between the draft-flue K and the balloon head G, through which said flue passes, I em ploy strips 1) p', preferably of felt, the strip p on the inner side of the balloon -head being usually plain,while the one p on the outer side thereof may be folded, and that portion adapted to come against the flue is stuffed with fibrous material to form a roll, pz, this construction being illustrated in detail, Fig. 2. The loose bearing of the balloon-head G is also made air-tight by packing-strips t, which latter may be either plain or stuffed.

The fan-casing I is provided with a discharge-opening, r, that enters the fine L, and at this point I provide a delector, s, to direct the current down said flue; and to prevent the fan from clogging, I also provide the casing with another discharge-opcnin g, u, to carry off the surplus air.

In the operation of my invention, the driv- IOO ing-shaft B, being set in motion,will, through the medium of the gearing above described, cause the balloon, fan-vanes, and conveyer to revolve. rIhe suction created by the revolution of the fan-varies draws the dust-laden air in a constant current uptheues v and in the direction of the arrows, Fig. 3, through the balloon-cloth H and draft-flue K, into the fancasing I, leaving the dust to accumulate upon said balloon-cloth, which is stretched tightly on the heads G G', as above described. As the balloon is revolved, the cloth H thereof comes in constant contact with the brush N, which acts to loosen the dustaccumulated on said cloth, and a portion of the air drawn into the fan-casing I is forced down the flue L and discharged through the mouth k of the nozzle M, immediately below said brush, thus causing the loosened dust to be blown off into the conveyer E, to be carried away.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a dust-collector, a main casing, a trav eling collecting medium, and a central draftflue, in combination with abrush hung within said medium and arranged to come in contact with the cloth thereof, a suction-fan, and blastflue provided with a nozzle having its mouth immediately below the brush and outside of said collecting medium, substantially as described.

2. In a dust-collector, a collecting medium having solid circular heads, each provided with an exterior anuulus composed of a series of toothed segment-plates, in combination with flanged guide-plates interiorly secured to the main casing and a revolving transverse shaft carrying gear-wheels that mesh with the respective annuli on said heads, substantially as described.

3. In a dust-collector, a main casing, a traveling collecting medium, anda draft-hue that has its inner terminus in the center of the collecting medium, in combination with a depressor hung withinsaid medium and arranged to come in contact with the cloth thereof, a suction-fan, anda blast-flue provided with a nozzle having its mouth immediately below the depressor and outside of the said collecting medium, substantially as described.

4. In a dust-collector, a main casing and a collecting medium that comprises solid circular heads having annular grooves in their rims, a suitable cloth stretched over the heads, and cords united at their ends by springs and arranged to draw the cloth into said grooves, in combination with means for revolving said medium and means for drawing a current of air through the same, as set forth.

5. In a dust-collector, amain casing, a travcling collecting medium, and a central draftflue, in combination with a suction-fan having its casing provided with a discharge opening connected with a blast-line and a deflector arranged to direct the air-current down said flue, a brush hung within the collecting` medium and arranged to come in contactwith the cloth thereof, and the blast-flue provided with a nozzle having its mouth immediately below the brush outside of said collecting medium, substantially as described.

6. A dust-collector comprising a main casing,-a traveling collecting medium, a central draft-flue, a brush suspended within and arranged to come in contact with and depress the cloth of said medium, a suction-fan unit ing with said draft-fine, a blast-flue having a tapered nozzle arranged immediately below said medium and brush, and a suitable conveyer, substantially as described.

7. A dust-collector comprising a main casing, a traveling vcollecting medium, a central draft-flue, a brush suspended within `and arranged to come in contact with and depress the cloth of said medium, a suction-fan uniting with said draft-liuc, a blast-fine having its mouth immediately below the brush and out- .side said cloth, and strips of felting secured to ROBERT WHlTEHILL.

Witnesses:

FRED Sci-inname, MAURICE F. FREAR. 

